[balinor]

Not php, tpl. You never want to edit the php files unless you have to. In the skin1 folder. Look for this bit of code and remove/comment it out.

{if $v.is_modifier eq 'Y' && $o.price_modifier ne 0} ({if $o.modifier_type ne '%'}{include file="currency.tpl" value=$o.price_modifier display_sign=1 plain_text_message=1}{else}{$o.price_modifier}%{/if}){/if}